Microeubria Lee and Yang 1994

Shepard, William D. & Sites, Robert W., 2019, Larval Psephenidae (Coleoptera: Byrrhoidea) of Thailand: Annotated List and Illustrated Key to Genera, The Coleopterists Bulletin 73 (2), pp. 259-282 : 271-273

Microeubria Lee and Yang 1994 Figs. 19 , 35 , Map C

Discussion. Microeubria was reviewed by Lee and Jäch (1996) and Lee and Yang (2002). The genus contains nine species that are distributed in India, Nepal, Thailand, Laos, and Indonesia. Larvae can be found in seepage areas. In Thailand, Microeubria hajeki Lee, 2016 and Microeubria longicornis Lee and Jäch, 1996 occur in Ranong Province: Ranong Hot Springs ( Lee 2016) and Chiang Rai and Huai Mok O (Lee and Jäch 1996), respectively.

Material Examined. Chiang Mai Province: Doi Inthanon National Park, Namtok Siriphum , 1460 m, 18°32’N 98°31’E, 3 April 2003, L-441, UMC and CMU teams (1L) . Mae Hong Son Province: Huay Pha, stream <1 km N of Ban, Huay Pha , 360 m, 19°25.847’N 97°59.827’E, 19 April 2009, L-1049, Sites, Pradit, Prommi (1L) . Nakon Si Thammarat Province: Namtok Yong National Park, Pliew Waterfall , rock pool, 8°10’N 99°43’E, 19 July 2006, L-960, Vitheepradit & Prommi (1L) . Songkhla Province: Ton Nga Chang Natl. Park, stream at Buddhist temple, 44 m, 6°56’N 100°15’E, 6 July 1997, L-127, R. W. Sites (29L, 2P); same locality, 9 June 2001, L-243, R. W. Sites (1L) .

Schinostethus Waterhouse, 1880 Figs. 4 , 7–10, 13 , 20 , 23 , 36 , Map D

Discussion. Schinostethus is a large genus with 28 species and has been revised by Lee et al. (1993, 1998). It is distributed in India, Nepal, Bhutan, Myanmar, Thailand, Laos, Vietnam, Malaysia, Indonesia, the Philippine Islands, China, Japan, and Taiwan. Larvae of Schinostethus satoi Lee, Yang, and Brown, 1993 were described by Lee et al. (1993). Larvae are often on wet rock surfaces and can be covered by detritus. Adults can be collected in April–August and are found on streamside vegetation. The four species known to occur in Thailand are Schinostethus flabellatus Lee, Yang, and Brown, 1993 , Schinostethus malickyi Lee, Yang, and Satô, 1998 , Schinostethus nigricornis Waterhouse, 1880 , and Schinostethus notatithorax (Pic, 1923) . They have been collected in Nakon Si Thammarat Province: Kedah Peak and Khao Luang, Nan Province: Mae Charin WF ( S. flabellatus ); Boripat ( S. malickyi ); Chiang Mai Province: Doi Inthanon, Doi Pui, Pha Hom Pok Mt. ( S. nigricornis ); and Banna, Thanon Thong Chia and Chiang Mai Province: Doi Sutep, Mae Klang, Mae Rim, Fang ( S. notatithorax ) ( Lee et al. 1998, 2003; Lee 2016).

Material Examined. Chiang Mai Province: Doi Inthanon National Park, Huay Sai Luang Waterfall, rock face, 1060 m, 18°31’N 98°27’E, 3 April 2003, L-443, UMC and CMU teams (1L); same locality, 4 April 2002, L-322, UMC and CMU teams (1L); Doi Inthanon National Park, Mae Pan Waterfall, 1100 m, 18°31’N 98°27’E, 3 April 2003, L-442, Sites, AV, Setaphan (2L); Doi Inthanon National Park, Siriphum Waterfall (highest level), 1460 m, 18°32’N 98°31’E, 21 III 2002, L- 316, R. W. Sites (11L); same locality, rock face, 1460 m, 3 April 2003, L-441, UMC and CMU teams (5L); same locality, 1460 m, N 18°32’ E 98°31’, 23 May 2004, G. W. Courtney (9L, 1P); same locality, 23 May 2004, G. W. Courtney (3L); same locality, 1380 m, 2 III 2002, D. Tapanya (2L); Doi Inthanon National Park, Namtok Sirichan, 900 m, N 18°32’ E 98°34’, G. W. Courtney (12L); Doi Sutep National Park, Mae Sa Falls, 1312 ft, 18°54.39’N 98°53.91’E, 25 III 1994, (WDS-A- 1045 on reverse), William D. Shepard (1L); Doi Sutep National Park, Nam Tok Monthathan, 700 m, 18°49’N 98°55’E, 8 April 2002, L-330, UMC and CMU teams (3L); Doi Sutep National Park, Sai Yoi Waterfall, 1100 m, 18°48’N 98°55’E, 5 April 2002, L-326, UMC and CMU teams (1L); same locality, rock face, 4 April 2003, L-447, Sites, AV, Prommi, Setaphan (2L); Doi Sutep National Park, Huay Kaew @ NT Sai Yoi, rock in splash zone, 1100 m, 18°48’N 98°55’E, 11 I 2003, P. Thamsanupap (4L); Doi Sutep National Park, Wang Bua Boon, 1832 ft, 18°42.74’N 98°56.51’E, 24 III 1994, (WDS-A- 1042 on reverse), William D. Shepard (1L); Doi Sutep-Pui National Park, creek from Mohk Fah Waterfall, rock face, 564 m, 19°06’N 98°46’E, 25 March 2003, L-415, Sites, Vitheepradit, Prommi (3L); same locality, 30 April 2003, L-491, AV, Thamasenanupap, Ferro (3L); same locality, 18 March 2002, L-304, R. W. Sites (1L); Doi Sutep-Pui National Park, Namtok Huay Pa Lad, rock face, 1250 m, 18°48’N 98°54’E, 29 April 2003, L-488, AV, Thamasenanpap, Ferro (2L); Doi Sutep-Pui National Park, Palad Waterfall, rock face, 713 m, 18°47’N 98°55’E, 19 May 2004, L-696, Vitheepradit, Prommi, Laudee (1L). Chiang Rai Province: Doi Luang National Park, Namtok Pu Keang, 540 m, N 19°26’ E 99°42’, 5 VI 2003, coll. Nathiporn (1L). Kampaeng Phet Province: Khlong Lan National Park, Namtok Khlong Nam, Lai, 16°11’N 99°15’E, 6 April 2003, L-448, Sites, Vitheepradit, Prommi and Setaphan (1L); Khlong Lan National Park, Khlong Lan Waterfall, rock face, 310 m, 16°07’N 99°16’E, 6 April 2003, L-449, Sites, AV, Prommi, Setaphan (1L); Khlong Lan National Park, Phetcha Khor Waterfall, 270 m, 16°17’N 99°14’E, 7 April 2003, L-452, Sites, AV, Prommi, Setaphan (1L). Kanchanaburi Province: Thong Pha Phum N. P., Jok Kra Din Waterfall, rock face, 645m, 14°41’N 98°23’E, 4 June 2006, L-916, Sites, Vitheepradit, Prommi (5L); Amphur Thong Pha Phum, small waterfall, 6.3 km W of Border Police Station at Ban Padsadoo Klang, rock face, 568 m, 14°32’N 98°32’E, 10 April 2003, L-463, UMC and CMU teams (8L). Loei Province: Na Haew Natl. Pk., Nam Tok Wahng Tahd, rock faces, 750 m, 17°28’N 100°57’E, 9 III 2002, L-277, Vitheepradit, Kirawanich, Setaphan (2L). Mae Hong Son Province: Namtok Maw Pang, 850 m, 19°22’N 98°22’E, 31 March 2003, L-428, UMC and CMU teams (1L). Nakhon Nayok Province: Khao Yai National Park, Salika Waterfall, rock face, 68 m, 14°18’N 101°15’E, 7 April 2004, L-606, Sites & Vitheepradit (1L). Nakhon Ratchasima Province: Khao Yai N. P., Pha Ta Bag Waterfall, rock face, 395 m, 14°21’N 101°20’E, 6 April 2004, L-604, Sites & Vitheepradit (18L). Nan Province: Namtok Sa Pan, stream with waterfall, 532 m, 19°11.403’N 101°11,850’E, 17 April 2009, L-1043, Sites, Vitheepradit, Prommi (2L, 1P); Namtok Tak Man, stream with waterfall, 352 m, 19°17.187’N 100°47.312’E, 17 April 2009, L-1045, Sites, Vitheepradit, Prommi (1L); Sa Pan Waterfall, rock face, 532 m, 19°11’N 101°11’E, 22 April 2003, L- 475, AV, Prommi, Setaphan (11L). Phatthalung Province: Nok Rum Waterfall, 37 m, 07°23’N 99°55’E, 5 June 2003, L-593, AV, Prommi, Ferro (13L). Phetchabun Province: Tad Mork N. P., Song Nang Waterfall, rock face, 800 m, 16°22’N 101°22’E, 30 April 2004, L-654, A. Vitheepradit (1L). Phitsanulok Province: Phu Hin Rongkla Natl. Park, Nam Tok Romglao, rock faces and stream, 1190 m, 16°59’N 101°00’E, L-288, Sites, Vitheepradit, Kirawanich (1L). Prachuap Khiri Khan Province: Amphur Bang Saphan, Sai Koo Waterfall, rock face, 73 m, 11°14’N 99°20’E, 18 May 2003, L-545, Vitheepradit & Ferro (3L). Phrae Province: Wieng Ko Sai National Park, Namtok Maekueng, tier 7, 430 m, 17°58’N 99°35’E, 22 March 03, CMU team (2L); Wieng Ko Sai National Park, Namtok Pujaen (upper), 295 m, 17°57’N 99°34’E, 24 viii 2002, CMU team (2L); Wieng Ko Sai National Park, Namtok Punjane (lower), 285 m, 17°57’N 99°34’E, 24 Aug 2002, CMU team (1L); Wieng Ko Sai National Park, Namtok Punjane, 17°56’N 99°34’E, 430 m, 28 March 2003, L-424, Sites, Vitheepradit, Prommi (1L). Ratchaburi Province: Amphur Suan Phueng, 50 km W of Amphur Chom Bueng on Hwy 3087, 192 m, 13°34’N 99°15’E, 16 April 2002, L-346, Vitheepradit & Kirawanich (1L). Sa Kaeo Province: Pang Sida National Park, Nam Tone Waterfall, rock face, 108 m, 14°02’N 102°02’E, 15 April 2004, L-626, Sites & Vitheepradit (51L). Sakon Nakhon Province: Huay Yai Waterfall, 259 m, 17°01.300’N 103°59.516’E, margin, 22 April 2004, L-632, A. Vitheepradit (1L exuvia). Sisaket Province: Phanom Dongrak Wildlife Sanct., Samrong Kiat Waterfall, rock face, 187 m, 14°30’N 104°29’E, 12 April 2004, L-621, Sites & Vitheepradit (1L). Songkhla Province: Ton Nga Chang National Pk., level 3 of waterfall, 53 m, 6°56’N 100°14’E, 30 May 2001, L-234, R. W. Sites (1L); waterfall behind faculty houses at Prince Songkla University, margin, 40 m, 7°00’N 100°30’E, 18 June 2006, L-959, Vitheepradit & Prommi (2L); Ton Plieuw, wet face of waterfall, 7°00’N 100°14’E, 7 Jan 1995, L-63, Sites & Nichols (1L). Suratthani Province: Kang Krung National Park, Bang Jam Waterfall, rock face, 159 m, 09°22’N 98°50’E, 25 May 2003, L-568, Vitheepradit, Laudee, Ferro (2L); Namtok Namvang, 9°28’N 100°00’E, G. W. Courtney (1L). Trang Province: Khao Ban Tad Wildlife Sanct., Ton Plieuw Waterfall, rock face, 95 m, 07°32’N 99°47’E, 4 June 2004, L-739, Vitheepradit & Prommi (2L). Ubon Ratchathani Province: Phu Chong Na Yoi Natl. Park, Huay Luang, rock face, 173 m, 14°26.513’N 105°16.449’E, 11 April 2004, L-616, Sites & Vitheepradit (4L). Uttaradit Province: Mae Cheuy Waterfall, 231 m, 17°47’N

100°10’E, 27 Apr 2003, L-487, Vitheepradit,

Prommi, Setaphan (1L).

Figures

Figs. 15–20. Morphological structures. 15) Sinopsephenoides: Stellate tubercles on venter; 16) Sinopsephenoides: Short and moderately narrow cephalic plate; 17) Granuleubria: Ninth abdominal segment entire posteriorly (from Lee et al. 2007); 18) Macroeubria: Ninth abdominal segment emarginated posteriorly; 19) Microeubria: Meso- and metathoracic paratergites truncate laterally; 20) Schinostethus: Meso- and metathoracic paratergites acicular laterally.

Figs. 31–36. Eubriinae genera, dorsal habitus. 31) Dicranopselaphus (from Lee et al. 2007); 32) Granuleubria (from Lee et al. 2007); 33) Homoeogenus (from Lee et al. 2007); 34) Macroeubria; 35) Microeubria; 36) Schinostethus.

Figs. 4–6. Setal fringes. 4) Schinostethus; 5) Undescribed Eubrianacinae; 6) Psephenoidinae: pharate larva.

Figs. 7–9. Ectozoic organisms attached to larval Schinostethus. 7) Filamentous algae (yellow arrow); 8) Peritrich protozoans attached to venter; 9) Insect egg cases.

Figs. 10–14. Morphological structures. 10) Schinostethus: Gills concealed beneath ventral operculum; 11) Undescribed Eubrianacinae: Palmate gills exposed on venter; 12) Psephenoidinae: Ninth abdominal segment surrounded by paratergites of eighth abdominal segment; 13) Schinostethus: Ninth abdominal segment not surrounded by paratergites of eighth abdominal segment; 14) Mataeopsephus: Gills with branches arising from central stalk. 7 = seventh abdominal segment; 8 = eighth abdominal segment; 9 = ninth abdominal segment.

Figs. 21–24. Morphological structures. 21) Dicranopselaphus: Prothoracic paratergites extending from middle of lateral margins (from Lee et al. 2007); 22) Undescribed Eubrianacinae: Unique pronotal suture (yellow arrow) configuration; 23) Schinostethus: Pupa; 24) Psephenoidinae: Pupa.